on 18-12-2023 12:04
on 18-12-2023 12:07
Try the web version, @ShaunL - https://accounts.o2.co.uk/signin
The app can be temperamental, but you can sometimes kick it back into action by uninstalling, rebooting phone, the reinstalling the app from your phone's app store. If you need more help, O2 via Social Media are contactable at the link just below.
on 18-12-2023 12:07
If you are trying to log in to the My O2 app
Instead try the web version
https://accounts.o2.co.uk/signin
If that works then delete the app, reboot phone and reinstall
If none of that works then
You can call O2 on 202
Or use the social media links below